Dear Dwi-san,
I think that
"uint8 I2C_MPU9250_Master_MasterSendStart(uint8 slaveAddress, uint8 R_nW)"
is an older version of
"uint32 I2C_MPU9250_I2CMasterSendStart(uint32 slaveAddress, uint32 bitRnW, uint32 timeoutMs);"
as sometimes I2C bus fails to respond and without timeout it hangs the total system.
And the error(s) you are getting seems to be there is/are typo in your project
or there is/are mixed versions of I2C APIs.
Or sometime we can clear the problem just clean and re-build the project.
Anyway without your sample project which can reproduce the problem attached, it's very difficult to verify.
FYI, the following is a simple I2C test program I wrote this morning utilizing my old sample and library.
Being a lazy, I wrote my wrapper functions for I2C, such as
==================
uint32 i2c_SendRestart(uint32 bitRnW)
{
return(I2C_I2CMasterSendRestart(i2c_slave_address, bitRnW, TIMEOUT_MSEC));
}
==================
schematic
pins
Tera Term log
Note: I used a LM75B (address 0x48) for testing, you can change the line
i2c_set_slave_address(LM75B_I2C_SLAVE_ADDR) ;
to use your device's address to test.
i2c_utils.c (My I2C wrapper functions)
==================
#include <project.h>
#include <stdio.h>
#include <ctype.h>
#include <string.h>
#include "i2c_utils.h"
#define TIMEOUT_MSEC 300u
uint8 i2c_slave_address = 0x00 ;
uint32 i2c_status(void)
{
return(I2C_I2CMasterStatus());
}
uint32 i2c_ClearStatus(void)
{
return(I2C_I2CMasterClearStatus());
}
void i2c_set_slave_address(uint8 newAddress)
{
i2c_slave_address = newAddress ;
}
uint8 i2c_get_slave_address(void)
{
return( i2c_slave_address );
}
uint32 i2c_SendStart(uint8 rw)
{
return(I2C_I2CMasterSendStart(i2c_slave_address, (uint32)rw, TIMEOUT_MSEC));
}
uint32 i2c_SendRestart(uint32 bitRnW)
{
return(I2C_I2CMasterSendRestart(i2c_slave_address, bitRnW, TIMEOUT_MSEC));
}
uint32 i2c_SendStop(void)
{
return(I2C_I2CMasterSendStop(TIMEOUT_MSEC));
}
uint8 i2c_readByte(uint32_t acknak) /* 6-Mar-2018 acknak added */
{
uint8 data ;
(void)I2C_I2CMasterReadByte(acknak, &data, TIMEOUT_MSEC) ; /* ignore error */
return( data ) ;
}
uint8 i2c_readReg(uint8 addr)
{
uint8 data ;
i2c_SendStart(0u) ; /* for write */
i2c_writeByte(addr) ; /* who am i */
i2c_SendRestart(0x1u) ; /* for read */
CyDelay(1) ;
data = i2c_readByte(I2C_I2C_NAK_DATA) ;
i2c_SendStop() ;
return( data ) ;
}
void i2c_readRegs(uint8 addr, uint8 *data, int len)
{
int i ;
i2c_SendStart(0u) ; /* for write */
i2c_writeByte(addr) ;
i2c_SendRestart(0x1u) ; /* for read */
for (i = 0 ; i < len-1 ; i++ ) {
CyDelay(1) ;
data = i2c_readByte(I2C_I2C_ACK_DATA) ;
}
data = i2c_readByte(I2C_I2C_NAK_DATA) ;
i2c_SendStop() ;
}
uint32 i2c_writeByte(uint8 data)
{
uint32 theByte, result ;
// I2C_I2CMasterSendStart((uint32)i2c_slave_address, 0u);
theByte = data ;
result = I2C_I2CMasterWriteByte(theByte, TIMEOUT_MSEC) ;
// I2C_I2CMasterSendStop() ;
return(result) ;
}
void i2c_writeReg(uint8 addr, uint8 data)
{
i2c_SendStart(0u) ; /* for write */
i2c_writeByte(addr) ; /* write register address */
CyDelay(1) ;
i2c_writeByte(data) ;
i2c_SendStop() ;
}
void i2c_writeRegs(uint8 addr, uint8 *data, int len)
{
int i ;
i2c_SendStart(0u) ; /* for write */
i2c_writeByte(addr) ;
i2c_SendRestart(0x0u) ; /* for write */
CyDelay(1) ;
for (i = 0 ; i < len ; i++ ) {
i2c_writeByte(data) ;
}
i2c_SendStop() ;
}
==================
main.c
==================
#include "project.h"
#include <stdio.h>
#include "i2c_utils.h"
#define LM75B_I2C_SLAVE_ADDR (0x48)
#define STR_LEN 128
char str[STR_LEN+1] ; /* print buffer */
void print(char *str)
{
UART_UartPutString(str) ;
}
void cls(void)
{
print("\033c") ; /* reset */
CyDelay(20) ;
print("\033[2J") ; /* clear screen */
CyDelay(20) ;
}
void splash(void)
{
cls() ;
snprintf(str, STR_LEN, "PSoC 4 I2C (LM75B) Test (%s %s)\n", __DATE__, __TIME__) ;
print(str) ;
}
void init_hardware(void)
{
CyGlobalIntEnable; /* Enable global interrupts. */
UART_Start() ;
splash() ;
I2C_Start() ;
i2c_set_slave_address(LM75B_I2C_SLAVE_ADDR) ;
}
int main(void)
{
uint8_t reg_addr = 0 ;
int8_t data ;
init_hardware() ;
for(;;)
{
data = i2c_readReg(reg_addr) ;
snprintf(str, STR_LEN, "%d\n", data) ;
print(str) ;
CyDelay(1000) ; /* 1sec */
}
}
==================
Best Regards,
12-Feb-2020
Motoo Tanaka
